The subject of Valuation is one of such superlative importance to the actuary that possibly even a merely repetitional paper may not be wholly without interest. Two of the most important contributions to the practical side of the science have appeared but recently in the Journal of the Institute of Actuaries—Mr. Chatham's paper on the books to be used in scheduling the particulars of the risks of a Life Assurance Company J.I.A., xxxii. 393), and that by Mr. Lidstone on the Valuation of Endowment Assurances in groups J.I.A., xxxiv. 61). What follows is in great measure an attempt, on the basis of these papers, to present forms for valuation purposes adapted to an Office declaring quinquennial reversionary bonuses on the Sum Assured or on the Sum Assured and Existing Bonuses—furnishing the particulars essential to an annual investigation, while at the same time providing for a quinquennial return to the Board of Trade.